The Conceptions of In-service and Prospective Primary School Teachers About the Teaching and Learning of Science

A study was performed to describe and analyze the conceptions about teaching and learning science held by different samples of teachers in Spain. The responses of 265 teachers (107 prospective teachers and 158 active teachers) to items from the Inventory of Scientific and Pedagogical Beliefs (Porlán, 1989) were subjected to multifactorial analysis. The results showed various tendencies in how the teaching/learning process is viewed, ranging from a predominant view based on the transmission-reception of knowledge to a minority constructivist view. There was a greater diversity of viewpoints among the in-service teachers than among the prospective teachers. In both samples, the most representative tendency was learning as appropriation of meanings, followed by a technical view of teaching among the prospective teachers and a more traditional view among the in-service teachers. Finally, some implications for teacher education are discussed.     

Learning Gene Expression Through Modelling and Argumentation

There is emerging interest on the interactions between modelling and argumentation in specific contexts, such as genetics learning. It has been suggested that modelling might help students understand and argue on genetics. We propose modelling gene expression as a way to learn molecular genetics and diseases with a genetic component. The study is framed in Tiberghien’s (2000) two worlds of knowledge, the world of “theories & models” and the world of “objects & events”, adding a third component, the world of representations. We seek to examine how modelling and argumentation interact and connect the three worlds of knowledge while modelling gene expression. It is a case study of 10th graders learning about diseases with a genetic component. The research questions are as follows: (1) What argumentative and modelling operations do students enact in the process of modelling gene expression? Specifically, which operations allow connecting the three worlds of knowledge? (2) What are the interactions between modelling and argumentation in modelling gene expression? To what extent do these interactions help students connect the three worlds of knowledge and modelling gene expression? The argumentative operation of using evidence helps students to relate the three worlds of knowledge, enacted in all the connections. It seems to be a relationship among the number of interactions between modelling and argumentation, the connections between world of knowledge and students’ capacity to develop a more sophisticated representation. Despite this is a case study, this approach of analysis reveals potentialities for a deeper understanding of learning genetics though scientific practices.     

Materialism and Deconstructivism: education and the epistemology of identity

Identity is one of the defining terms of the 1990s in England. Currently, academic, political and popular discourses highlight the pervasiveness of the term. However, what is missing from these accounts is an awareness of its philosophical roots. Consequently, most of these accounts are theoretically under‐developed, marked by conceptual confusion and conflation. This paper is concerned with the formation of identities within the context of educational arenas. More specifically, we focus upon the philosophical positions of materialism and deconstructivism, highlighting the particular dynamics of their epistemologies of identity. We suggest that at a time of political retreat and and intellectual self‐doubt among educationists, critical social scientists are making available productive conceptual frameworks within which to explore identity formations in educational sites. Recent theoretical developments in sociology and cultural studies provide an opportunity for philosophy of education to play a vital role here, in engaging with new ways of thinking about old philosophical problems. Within the context of an increasing reductionist policy focus on managerialist solutions, philosophy helps us to challenge the ideological conversion of moral and political questions into technicist ‘problems’.     

环磷酸腺苷葡甲胺治疗支气管哮喘42例临床研究

目的探讨环磷酸腺苷葡甲胺治疗支气管哮的疗效.方法将82例支气管哮喘住院病人随机分成心先安治疗组(42)和非心先安治疗组(40例).结果心先安治疗组控制有效率达97%,对照组达74%,两组对比有显著性差异.结论心先安治疗组提高疗效缩短病程,显著优于对照组.     

Understanding the Idea of Chemical Elements and Their Periodic Classification in Spanish Students Aged 16–18 Years

The work reported here involved a comparative study regarding the understanding that high school students (16–18 years) have of the concept of chemical elements and their periodic classification. More specifically, the level of knowledge on this topic was compared before and after the completion of baccalaureate studies in a sample of Spanish students. In order to achieve this goal, a questionnaire was developed that included 14 items in an open format, through which various aspects of the students’ understanding of the idea of chemical element and their periodic classification were assessed. In addition, the application of this knowledge to interpret and predict the behaviour and properties of elements and to carry out calculations on the atomic composition of the elements was evaluated. Aspects concerning the acquisition of scientific knowledge, the application of knowledge to different contexts and situations, and the use of scientific evidence to draw conclusions and knowledge about the nature and history of science were evaluated. The questionnaire was previously validated with a large group of students. The results of this study show that improvements occur primarily in addressing higher level cognitive questions (analysis, synthesis and evaluation) in comparison to the lower level tasks (capacity for retention, understanding or direct application of learning). In addition, students who start high school have a very limited understanding of the ideas behind the Periodic Table of the chemical elements and that their lack of understanding, to a large extent, remains upon completion of the baccalaureate. These results suggest that there are real difficulties in understanding this topic and show the limited influence of the studies completed in high school.     

The Impact of Individual,Educational, and Workplace Factors on the Transfer of School-Based Learning into the Workplace

The aim of this study was to investigate the transfer of learning of professional competences from vocational colleges to the workplace context in vocational education. Concretely, the study examined the relations between the professional competences learned at school and the use and further development of those competences at the workplace during the practice module in vocational education programmes in Spain. The study analysed individual, educational design and work environment factors that facilitate or hinder transfer of learning. The study took a multidimensional approach to professional competences by observing four dimensions: hard-specific, hard-generic, interpersonal and intrapersonal. The data collection drew from a questionnaire administered to students of vocational education programmes (N = 379) after they had completed the practice module scheme. A moderation analysis was applied to observe the effect of individual, educational design and workplace factors on the relation between the competences learned at school and those used at the workplace. The findings showed that compulsory placement, school-work alignment, work-based supervisor, access to resources and task complexity are significant moderators between the competences learned at school and those used at the workplace. The study highlights the coherence between the school and workplaces and work environment characteristics as factors conducive to transfer of learning.     

Young people in the argentine education system: Their inclusion and exclusion

Graduate in political sciences, University of El Salvador. Post-graduate in education and society, Facultad Latinoamericana de Ciencias Sociales (FLACSO, Argentina). Co-ordinator for education and society, post-graduate professor of education and society and of the diploma in social sciences (educational management) for FLACSO. Invited post-graduate professor at the University of Bologna. Consultant to the OEI, CEPAL and INAP. Professor of educational policy at the National University of La Plata. Editor of the reviewPropuesta educativa [Educational offer].     

Applying educational models in technological education

This paper presents a group of elements to improve teaching and learning in technological education. These elements are based on some contributions issued from contemporary educational models, namely, the thematic approach, meaningful learning, concept maps, and the spiral curriculum. Based on a thematic approach, a new way is proposed to select the contents that will be explored in the educational process. We emphasize the benefits of a thematic approach in students’ motivation. After contents are chosen, we propose the use of the directives of meaningful learning and concept maps, as a method and as a tool, respectively, to organize knowledge hierarchically, from general and inclusive concepts to specific ones. This may facilitate learning and understanding of the great bulk of knowledge to be dealt with during technological courses. A proposal has been submitted for a teaching module in computer networks and also for a complete course plan. The spiral curriculum was applied during the development of learning in the classroom, where some fundamental concepts were introduced many times over, adding more details gradually. A qualitative analysis of the application of these educational proposals, including learning evaluation aspects, is also presented.     

A Lakatosian Framework to Analyze Situations of Cognitive Conflict and Controversy in Students' Understanding of Heat Energy and Temperature

The objective of this study is to analyze secondary school students' interactions (conflicts, controversies, and arguments) as they participate in an intact classroom activity designed to facilitate their understanding of heat energy and temperature. The study is based on 32 ninth-grade students in a public school in Londrina, Brazil. Results obtained show that the differentiation between heat energy and temperature constitutes considerable difficulties for the students, and can be considered as part of the hard-core of their understanding (Lakatos, 1970, Criticism and the Growth of Knowledge, Cambridge University Press, Cambridge, UK, pp. 91–196). Student interactions (video taped) were classified into an Alternative Model, Transitional Model, and Scientific Model, depending on the degree to which they reflected a progressive transition in their hard-core. Students generally resisted a change in their conceptual understanding. Some students were able to question the hard-core of their beliefs and construct a Transitory Model. Some students experienced a further progressive transition by constructing a Scientific Model, based on the understanding that Temperature only measures the energy of agitation. Methodology used also provided a glimpse of how a particular student grappled with the conflicts in order to facilitate progressive transition in understanding. It is concluded that given the opportunity to discuss, reflect, consider alternative/conflicting situations, students can construct models that increase progressively in their heuristic/explanatory power.